First, start by using the square roots. The square root of x^2 is x, and the square root of x^5 is x^2.5. Then , multiply by adding the exponents, so x * x^2.5 is x^(2.5+1), since x can also be written as x^1. Lastly, simplify by adding 2.5 and 1 and get x^3.5
so she has $550 and she did 20 cats and it costs $5 per cat and 5 x 20 is $100 and $550 - $100 = 450 and 450 divided by 10 ( because it's $10 per dog) is 45.
